It’s like what @not_owen_wilson said:
We compiled the Lua as a warning to you–that everything inside belongs to us and might change at any moment. 
We don’t mind if you take a look and play with whatever you like as long as you accept that whatever you build is like a sandcastle–almost inevitably, the foundation it’s built on will get eroded by the tide of stuff-changing/ performance/bug/feature optimization. (For a sense of scope, my carpenter code has changed a dozen times since I first wrote it in June, in reaction to various optimizations we made to stuff lower down.) If you choose to make it easy to share what you’ve learned on the forum, make sure to share that warning around too.
Thanks for being so sensitive. 
We really appreciate it.